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Bureau County, IL Water Quality

Water quality data for 22 public water systems serving Bureau County, Illinois — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 22 water systems · 22 cities
⚠️
Caution Advised — Some Systems Need Attention

Some systems have elevated lead levels or active violations. Check your specific city below.

C

Bureau County Earns a C

Bureau County: 22 communities across 22 water systems. 72.7% have no open violations.

  • Median lead where detected: 1.34 ppb
  • 10 communities with a lead detection, 12 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 19 with significant inspection deficiencies
  • 72.7% of communities have no open violations
1.34 ppb
Median Lead Level
County-wide, 90th percentile
22
Water Systems
Active CWS & NTNCWS
72%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • Sheffield
    1.40 ppb
    No federal limits exceeded on record
    B
  • Spring Valley
    Not detected
    2 significant inspection deficiencies
    A
  • Princeton
    3.10 ppb
    2 significant inspection deficiencies
    B
  • Malden
    Not detected
    Copper above the 1,300 ppb action level
    B
  • De Pue
    Not detected
    5 significant inspection deficiencies
    B
⚠ Needs Attention
  • Dover
    0.30 ppb
    Copper above the 1,300 ppb action level
    F
  • Dalzell
    Not detected
    1 violation currently open
    D
  • Mineral
    Not detected
    1 violation currently open
    D
  • New Bedford
    Not detected
    1 violation currently open
    D
  • La Moille
    5.22 ppb
    Copper above the 1,300 ppb action level
    D
County Lead Level — Median 1.34 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1.34 ppb — 8.9% of the federal action level
Systems by Lead Level
Under 5 ppb
8
5 – 10 ppb
1
10 – 15 ppb
1
No Data
12

All Cities in Bureau County

Princeton 3.10 ppb B
Spring Valley Not detected A
De Pue Not detected B
Walnut Not detected C
Ladd Not detected B
Wyanet 1.09 ppb C
Sheffield 1.40 ppb B
Tiskilwa Not detected C
La Moille 5.22 ppb D
Dalzell Not detected D
Buda 0.69 ppb C
Ohio Not detected C
Cherry 13.80 ppb C
Neponset Not detected D
Manlius 4.78 ppb C
Malden Not detected B
Bureau Junction 0.10 ppb B
Seatonville 1.27 ppb C
Mineral Not detected D
Arlington Not detected B
Dover 0.30 ppb F
New Bedford Not detected D
Showing 22 cities
No active violations Active violations

About Bureau County Drinking Water

Bureau County is served by 22 water systems covering 22 communities. 73% have no open violations.

Of the communities reporting lead results, 10 recorded a detection, with a median of 1.34 ppb — 9% of the federal action level. 12 reported none detected, which means below the laboratory limit rather than an absence of lead.

No community here has PFAS above the federal limit on record. State inspectors recorded significant deficiencies at 19 of them.

Frequently Asked Questions

Is Bureau County tap water safe to drink?▼
73% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Bureau County?▼
Among communities with a detection the median is 1.34 ppb, 9% of the 15 ppb action level. 12 reported none detected and 0 reported no result.
How many water systems serve Bureau County?▼
22 community water systems serve 22 communities here.
← Back to Illinois water quality overview